PROMO Guru Autowerks - ZF 6HP26/28 Transmission Adapter

GuruAutowerks

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Nov 26, 2020
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07 335i
Who are you referring to as 'he'? There was someone claiming to have an 8hp75 in their car with no adapter, swearing up and down, but never backed it up, is that who you're referring to?

Ah, I didn't know the 6r80 solenoids were controlled externally, that would make it a lot easier. To get trans brake working without an external TCU, probably need to get some wires direct to the solenoids.

My apologies for not being more specific I dont know his name right now, but yes it was the person claiming to have an 8HP75 that bolted straight up no adatper... not an 8HP70 my mistake.

Yes for the trans brake, one way or another youre going to have to wire into the solenoids which would be easier if the TCU was external but I still think its doable in way or another either with bulkhead seal for wires through pan or preferably with unused pin/connector locations on the factory TCU/mechatronic connector.
 

nyt

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Sep 15, 2019
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2010 335xi
My apologies for not being more specific I dont know his name right now, but yes it was the person claiming to have an 8HP75 that bolted straight up no adatper... not an 8HP70 my mistake.

Yes for the trans brake, one way or another youre going to have to wire into the solenoids which would be easier if the TCU was external but I still think its doable in way or another either with bulkhead seal for wires through pan or preferably with unused pin/connector locations on the factory TCU/mechatronic connector.

If there are unused pins, that would make it trivial. Going through the filter would work, but that's a bit sketchy. I wonder how many people would even want trans brake, that's fairly hard core drag racing for setups where brake boosting won't work. It's a bit of a parts killer, too. That said, I'm sure some will definitely want.

At some point I'm going to see if I can find any front diffs that bolt up to the N54 that are a bit beefier, it's been on my list for a while but I just haven't had time.
 

GuruAutowerks

Private
Vendor
Nov 26, 2020
42
113
0
Houston, TX
www.guruautowerks.com
Ride
07 335i
If there are unused pins, that would make it trivial. Going through the filter would work, but that's a bit sketchy. I wonder how many people would even want trans brake, that's fairly hard core drag racing for setups where brake boosting won't work. It's a bit of a parts killer, too. That said, I'm sure some will definitely want.

At some point I'm going to see if I can find any front diffs that bolt up to the N54 that are a bit beefier, it's been on my list for a while but I just haven't had time.
I agree its pretty extreme, but as you said there will be some who definitely want it. Most of my testers committing right now are pretty damn serious... some extremely so and for them its right down their alley. I do believe it has likely potential to be harder on the trans, just because of the shock force on launch hitting the shafts etc.

If you figure out something with the front diff please let me know, I will start on that later this year/early 2022. I would be happy to share what I find out as well.